Homepage (PySoulSeek): http://www.sensi.org/~ak/pyslsk/
Homepage (Museek): http://museek.thegraveyard.org
An easy-to-use music-only file sharing client that is ad and spyware-free. Soulseek is available for Windows as well as in Python (PySoulSeek aka PySLSK and Nicotine) for Linux/BSD, and a Fink hack for Mac OS X.
It features offline queuing, room/theme-based as well as 'private' chat, user info and phonebook page, and fast searches. Also there is a 'wish list', in which you can enter keywords. Soulseek will search for the words in the list regularly.
For infoAnarchy related chat on Soulseek try room: !!(A)RaDiCaLs